While he was doing homework, his sister _______(learn) English.
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didn’t learned
-
was being learned
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learned
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was learning
Đáp án: was learning
Lời giải chi tiết : Câu diễn tả hai hành động xảy ra song song trong quá khứ.
Công thức: while + S was/were + V-ing, S was/were + V-ing
=> While he was doing homework, his sister was learning English.
Tạm dịch: Trong khi anh ấy đang làm bài tập về nhà thì chị gái anh ấy đang học tiếng Anh.